Means for uniting metal parts.



Y J. G. DAWSON. MEANS FOR UNITING METAL PARTS. APPLIOATION FILED JULY 6,1908.

928,947, Patented July 27, 1909.

iFzflazzzai'? Jmas' a ja/zmazz vto ' lTiE D STATES PATENT orrron JAMES .(J. DAWSON, OF WEBSTER GROVES, MISSOURI, ASSIGNOR TO SIEBER 6;.T RUSSELL MANUFACTURING COMPANY,'A CORPORATION OF MISSOURI.

MEANS ron um'rme METAL Pam's.

To allwlzom'it may concern-r LBe 1t known that l, JAMES citizen of the United States, and resident of .Webster Groves, county of St. Louis, and

State of Missouri, have invented certain new and useful Improvements in Means for Unit ing Metal Parts, of which the followingis' a specification and which are illustrated in the accompanying drawings, forming a part thereof- Theinventionrelates to means for uniting .metal parts and more particularly to-means for securing a metal post in an upright posi tion on a metal plate orbase.

The Ol)]GC-t of theinvention is to provide improved means for permanently and firmly clenching to resist any distortion of the con-- nected parts which might, if unresisted, ad-.

mit of their being separated.

Inthe accom anying drawings Figure 1 shows a centra I vertical section of metal parts assembled for connectionin the man ner provided by the invention, Fig. 2 is similar to Fig. 1 but shows the parts clenched in connected position, and Fig. lyis a sectional view taken on the line 33 of Fig. 2.-

The parts shown in the drawings illustrate the application of the invention to 'perma- 1". ently securing a metal post in upright position on a metal'base plate 11. In carrying out the 1nvention the foot the post is made tubular as indicated at 12 and its extremelower end isreduced in diameter to provide a circumferential shoulder 13 thereon. The base plate -11 is provided .with an aperture 14, preferably. of such size that the reduced endof-the post will fit .quite snugly therein; As shown that part of the post 10 which is of reduced diameter is of such length that' whentheparts are-assembled for connection as shown in Fig. 1- of the drawings'a portion 15 of the end of-the post will project through the aperture 14 to a point beyond the back of the plate when the annular shoulder 13 engages the face ofi the plate 11 about the aperture.

A die 16 is provided. for clenching the pro C. DAWSON, a,

Specification of Letters Patent. Patented July 27, 1909. Application filed July 6, 1908. Serial No. 442,180.

the plate 11. As shown this die has a central stem '17 adapted to enter the tubular end 12 of the post. Preferably a portion of the wall of this stem remote from its outer end is knurled as shown at 18 thereby somewhat increasing the diameter of the stemand providing a portion of its wall with a large number of longitudinal ridges 19, arranged circumferentially thereon most clearly shown in Fig. 3. These ridgefiQseI-ve to score the inner wall of the tubular end of the post during theassembling of the parts causing'the the flanging operation incide'ntto its being clenched over on the back of the plate by the die 16. By increasing the'diameter of the stem 17 remote from its point by the knurling operation," provision is made for enlarging the tubular end of the post 10 within the apjectingend 15- of the post onto the back of end wall of the stem to more readily yield to .erture 14 of the plate 11 as by the introduction of a wedge. for'fianging over the rejecting end 15 of the 0st onto the back 0 the plate 11 the m- 20 which en "ages the end of the 0st and has rounded wa s for forming or ending the walls of the post. Preferably a part of the channel 20 extends into the stem 17 as most clearly shown at 21 Fig. 1 whereby the stem its'reduced in diameter or under-cut at its ase.

ner ace of the die '16 has an annular channel For permanently uniting the base lt) and 5 the plate 11 the die 16 is ap lied-to the end of the post after the latter as been inserted through the aperture 14 in the plate, as shown-by insertlng the stem 17 into the tubu- I lar end 12 of the post.- Pressure is then apof plied to the die'as by striking it a hammer thus causing the knurled portlon 18 of the stem to enter the end of the 0st whereby the latter is enlarged to bear tig 'tly upon the walls of the aperture 14 of the plate and has its inner walls scored to more readily yield to- 10,0

the flanging subsequently efliected by the die 16. Continued-application of ressu etc the die 16 causes the walls of t echa el 20 formed on its inner faceto engage and deflect the end wall of the post, the parts being pref- 'erabl; so pro ort-ioned that when this operation 1s. comp eted the channel 20 is substan- .'tially filled with the distorted material of the post, that part .of the metal of the 0st which enters the under-cut portion 21 o the channel serving to lock the die in position and that part of the material of the Wall of v the post which has been flanged outwardly die having a head entering the end of the engaging the back of the plate 11 about the aperture 14 to prevent the separation of the post and plate. As the die 16 is permanently secured in position on the end of the post when the operation is completed, ltr serves to prevent the application of any tool to the clenched over end of the post for disconnecting the parts and the stem 17 of the die serves by filling the tubular portion 12 of the post to add rigidity to the walls of the post apout the point of its connection with the p ate.

I claim as my invention 1. In combination, an apertured plate, a-

post having a tubular end of reduced diameter entering the aperture of the plate, and a post, the inner face of the head of the die aving an annular channel for receiving the end of the post and the stern of the die being knurled.

2. In combination, an apertured plate, a post having a tubular end adapted to enter and project through the aperture of the plate,

and a die for clenching the projecting end of the post onto the plate having a stem adapted to enter the tubular end of the post and be permanently secured therein by the I clenching.

3. In combinatiom an apertured plate, a

post having a tubular end adapted to enter and project through the aperture of the plate, and a die for clenching the projecting end of l. w the post onto the plate having a knurled stem ada ted to enter the tubular end of the post and e permanently secured therein by the clenching.

4. In combination, an apertured plate, a post having a tubular end adapted to enter and project through the aperture of the plate and an annular shoulder adjacent such tubular end for engaging the face of the plate about the aperture, and a die for clenching the project-ing end of the post onto the back of the plate having a head and a stem adapted to enter the tubular end of the post, the inner face of the head of the die having an annular channel for receiving and bending the end of the post, a part of the channel-being out under the stem of the die whereby when the channel is filled with the clenched end of the post withdrawal of the die is prevented. I

5.-In combination, an apertured plate, a shouldered member having a tubular stem adapted to enter and project through the ap- 

